Zone 5, which can be found from the intersection of Foo Shing and Baa Dur by walking west along Patch until the next set of traffic lights (there is a 7-11 or similar), turning left, and walking down the road a bit, but not as far as the next intersection. It is on the left (east side) and has a blue sign.
Alternatively, from the same intersection of Fu Hsing and Bade, walk east for 5 mins, but not as far as the hospingtall. There will be a 7-11 or summat at the traffic lights, opposite which is Jazz.
I’m told Zone 5 does better B&W prints. How much? How long is a piece of string? I’d leave my B&W fim with Zone 5. Jazz are fine too, they have done nice B&W developing for me in the past, and with trickier film than T-MAX.
If you’re looking to rent a dark room then there are a few love hotels I can heartily recommend.